package com.bjsxt.base.conn001;

public class MyThread extends Thread {
    private int i = 5;

    /**
     * 不加 synchronized 会出现问题
     */
    @Override
    public synchronized void run() {
        i--;
        System.out.println(this.currentThread().getName() + " count: " + i);
    }

    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        Thread t1 = new Thread(myThread,"t1");
        Thread t2 = new Thread(myThread,"t2");
        Thread t3 = new Thread(myThread,"t3");
        Thread t4 = new Thread(myThread,"t4");
        Thread t5 = new Thread(myThread,"t5");
        t1.start();
        t2.start();
        t3.start();
        t4.start();
        t5.start();
    }
}
